Metal-forging machine



(No Model.) 2 Sheets-Sheet 1.

P. G. MYERS. METAL PORGING MACHINE.

No. 591,285. Patented Oct. 5,1897.

(No Model.) 2 Sheets-Sheet 2. E. G. MYERS. METAL PORGING MACHINE.

No. 591,285. Patented Oct. 5,1897.

Minimum: 4 iw lll'fl Il MMW" :|: "IIQH E W W l` i l M KH .a 1m. im* i. 6@ i, I v Q ab Mz dw UNTTEE STATES PATENT Enron.

FREDERICK GEORGE MYERS, OF PHILADELPHIA, PENNSYLVANIA.

METAL-FORGlNG NlACt-HNE.

SPECIFICATION formingpart of Letters Patent No. 591,285, dated October 5, 1897.

Application led December 24, 1896. Serial No. 616,881. (No model.) Patented in South African Republic May l, 1895, No.858,

To all whom it may concern.-

Be it known that I, FREDERICK GEORGE MYERS, a citizen of the United States, residing in Philadelphia, Pennsylvania, have invented certain Improvements in Metal-Forg ing Machines, (for which I have obtained Letters Patent in South African Republic, No. 85S, dated May l, 1895,) of which the following is a specification.

My invention relates to certain improvements in machines for forging rock-drill bits, and especially those of the star type, although the machine can be used in shaping chiselbits and tools of a like nature.

The obj ect of myinvention is to so construct the machine that the dies will come together in unison at agiven point and will have a limited quick movement, so that the bit or other tool inserted between the dies will be quickly formed in the desired shape.

ln the accompanying drawings, Figure l is a perspective view of my improved forgingmachine. Fig. 2 is a front view of the machine with the cap removed. Fig. 3 is a section on the line 3 i3, Fig. 2. Fig. e is a section on the line i 4.-, Fig. 2. Fig. is a perspective view of one of the dies. Fig. Gis a view illustrating a two-die machine, and Fig. 7 is a perspective view of a star-bit blank after being forged.

A is the frame of the machine, being made hollow for the reception of water or other cooling liquid, and adapted to the projecting head A of this frame is a cap A2. On the head is an annular rib a, adapted to an annular groove in the cap A2, and the cap is confined to the head by bolts a3. By this construction the cap will be centered on the head.

The head A', as shown in Fig. 2, has four radiating ways, and adapted to these ways are the forging-dies l5, which are shaped at one end to conform to the finished blank and are shaped at the opposite end in the form of a cam.

The rear of each die is slotted at b2, and adapted to the slot is a block c, which is somewhat narrower than the slot. This block is secured to the head A and limits the motion of the sliding die.

Each die, as shown in Fig. 2, has a V-shaped end b, which, when the four dies are assembled, form a cruciform opening of the size of the blank to be shaped.

The cam-shaped end b of each die projects into the path of rollers d, journaled in rings VD D. These rollers extend beyond the dies and travel on the circular periphery a4 of the head and cap, as shown in Fig. 3.

E is a driven ring iitting snugly over the series of rollers d and between the rings D D. The ring E is preferably made solid and heavy, and its outer surface is shaped to receive a driving-belt. The ring is driven., preferably, at a moderately high speed, and as it is in frictional contact with the rollers d it will drive them around their aXis and forward around the head A, so that if a heated bar is placed in the space between the dies the cam portion of the dies will project in the path of the rollers, and as the rollers travel forward they will come in contact with the dies, the rotating ring tending to force the rollers ahead, the rollers acting as a wedge to move the dies toward the center, crushing the bar into cruciform shape. The rollers are so spaced in respect to the dies that they will act on the four dies simultaneously, so that the pressure at the center is equal.

l make the head A hollow, as shown in Fig. 4, and circulate water or other cooling fluid in the hollow portions of the head and frame, s'o that a water-jacket is formed on three sides of each die, which keeps the slideways sufficiently cool, so that they can be properlylubricated, as the dies become heated by coming in contact with the heated blank.

Vhen it is required to make a machine with two dies, l may make it as'shown in Fig. 6. The ends of the dies may be shaped so as to conform to the tool to be made, and if, for instance, a .chisel-bit is to be made having two flat sides with flaring edges I may use the two-die machine, as shown in Fig. 6, for iiattening and edging, or IA may make the tool in the four-die machine, in which case two side dies would be narrow and the other dies broad. The blank produced in this machine can be transferred to another machine for cutting off and pointing or can be ground down to a cutting edge, if desired.

The rings D D can be held togetherin any IOO suitable manner. In the present instance I have shown them coupled together by shouldered studs CZ.

It will be seen that two or more dies may be used in the machine, depending altogether upon the character of the work to be produced.

In operating the machine I take a round or oct-agonal bar and heat the end to a forging heat. Then I pass it into the opening formed by the dies and gradually press it forward as the dies rapidly reciprocate toward and from the center. The pressure of the bar against the dies tends to force them out into the path of the rollers, so that thevaction of the machine is to gradually work down the bar to the proper shape, this shape being cruciform in the present instance.

The bar can be shaped to any length required, and in order to flare the end to give the drill-bit the proper shape I preferably upset and pass it again into the machine, and so on until the drill-bit assumes the proper width.

In re-forming a drill-bit I simply heat the bit, upset it so as to thicken the end, and pass it into this machine prior to cutting it off in the edging-machine.

I claim as my inventionl. The combination in a machine for forging star bits, of a head, four radial dies therein, a driven ring and rollers mounted between the driven ring and the head and acting to force the dies toward a common center, each die having a shouldered V-shaped end beveled at the outer edge, forming, when the dies are closed, a cruciform channel enlarged at one end, substantially as set forth.

2. In a forging-machine, the combination of the fixed head, two or more dies adapted to slide therein, and adapted to extend beyond the periphery of the head, a series of rollers mounted on the periphery of the head, and a driven ring carried solely by the rollers, so that on the rotation of the ring the rollers will rotate on the periphery of the fixed head, and around their own axis, substantially as described.

3. The combination in a forging-machine of the fixed head, sliding dies therein adapted to extend beyond the periphery of the head, two roller-rings D D, rollers mounted therein adapted to travel on the periphery of the fixed head, a driven ring having its bearings solely on the rollers an d mounted between the rollerrings, substantially as described.

4. The combination in a forging-machine, of the fixed head having an annular recess, a cap secured to the head so as to form therewith an annular chann el, two roller-rings, and rollers mounted in the channel, the rollers adapted to travel on the periphery of the fixed head, a cap, dies confined between the head and the cap and having their outer ends in the form of cams, with a driven ring carried by the rollers, and mounted between the roller-rings, substantially as specified.

5. The combination in a machine for forging rock-drills, a frame having a head provided with slideways, dies adapted to said slideways, means for operating the dies, said head having a water-chamber at the back of the slideways, so as to keep the slideways cool and to counteract the heat of the dies, substantially as described.

6. The combination of the frame having a iixed head provided with slideways, reciprocatin g dies adapted to said slideways, means for operating the dies, the head having a water-chamber at the back and at each side of each slideway, so as to keep the slideways cool and to counteract the heat of the dies, substantially as described.

7. The combination in a forging-machine of the fixed head having slideways therein, a cap secured to the head, a frame, an annular channel, an annular rib on one part adapted to an annular groovein the other part, means for securing the two parts together, diesadapted to the slideways, rollers adapted to travel around the head within the annular channel and to act upon the dies, with a driven ring carried by the rollers, substantially as described.

S. In a forgingmachine, the combination of the fixed head, a central opening therein', two or more dies adapted to slide in the said head, each die having a cam-face, a series of rollers mounted on the periphery of thehead, a driven ring carried solely by the rollers, a cap having a central opening, said cap being secured to the head, the arrangement being such as to allow for the free passage of a tool or blank through the center of the machine, substantially as described.

In testimony whereof I have signed my name to this specification in the presence of two subscribing witnesses.

FREDERICK GEORGE Iitnessesx WILL. A. BARR, Jos. H. KLEIN.

MYERS.

IOO 

